Maybe not exactly what you're looking for, but in the Finders and Seekers section, I created a thread where I share story ideas with whoever wants them. The link is in my signature.
But it sounds like you have the ideas, and just want help fleshing them out. I'd be happy to help if I can. My PM box is open. When people run a spark of an idea by me, my mind just starts coming up with possibilities. It's kind of a curse, really, because I get the feeling it comes across as 'Okay, you're idea was good, but here is one even better.' That's not how I mean it of course. I just get excited about possibilities and that's how my mind works. it's why I have so many ideas for stories that I put them in a place where other people can help themselves to them. I couldn't possibly write them all, even if I wanted to.